How Your Body Knows When to Grow, Sleep, or Eat

Internal clocks—called circadian rhythms—govern these cycles.
Hormones like melatonin and cortisol signal time of day.
Growth hormone surges during deep sleep.
Ghrelin rises before meals to trigger hunger.
Leptin tells the brain when you’re full.
Light exposure resets hormonal timing daily.
Jet lag occurs when hormone cycles fall out of sync.
Consistent sleep and meals keep rhythms stable.
Your brain and glands talk constantly to maintain timing.
Hormones keep your body’s schedule right on time.